I'm very poor in math, but I don't think you can cancel out (A-B) like you do in the next step.

re: (after this line...)
(A + B) (A - B) = B (A - B)

~samwik

Last edited by samwik; 12/23/06 12:52 AM.
Pyrolysis creates reduced carbon! ...Time for the next step in our evolutionary symbiosis with fire.